Ch 10.8 only

Ch 10.8 only - Ch. 10.8 Molecular Orbital Theory: Electron...

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Ch. 10.8 Molecular Orbital Theory: Electron Delocalization A. Molecular Orbital (MO) Model a. e- are delocalized throughout the entire molecule a.i. e- are not located just b/w two atoms of bond, but all over the molecule a.ii. atomic orbitals form MOs spanning the entire molecule (not just b/w nuclei) a.iii. only consider valence shell orbitals + electrons b. x atomic orbitals produce x MOs c. MOs filled in order of increasing energy (Aufbau’s Principle—will fill lowest orbitals first) d. MOs have max capacity of 2e- (exclusion principle) e. MOs of equal energy are half-filled w/ parallel spins b4 any is filled completely (Hund’s rule/”Man’s Law”) f. 2 types of MOs f.i. bonding MOs : are stabilizing f.i.1. lower energy than atomic orbitals f.i.2. electron density exists b/w nuclei f.i.3. you want more electrons here than in antibonding b/c stable f.i.4. when orbitals have the same phase, results in constructive interference—increased electron density in internuclear region f.ii. antibonding MOs (*) are destabilizing
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Ch 10.8 only - Ch. 10.8 Molecular Orbital Theory: Electron...

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